Happy to say I now have the answer! Have added it as an update at the bottom of this post.

Am blessed to have so many incredible friends.

It blows my mind too yet I am assured by some this electrical process is taught to children in science class as the action of a galvanic cell. And therefore no big deal. This seems odd to me because 95% of the people I mention this to seem completely amazed and appear to have no knowledge of it. Certainly I cannot personally remember being taught this information in school. Though perhaps I just wasn't concentrating in that lesson!